Drag (one's) ass American vulgar slang
If someone "drags his/her ass", he/she intentionally moves or works slowly.
You has a high fever. Stop dragging your ass and go to see a doctor.
We have dragged our ass on this project for months.
If someone "drags his/her ass", he/she leaves a place.
We will miss the last bus if we don't drag our ass right now.
The verb "drag" should be conjugated according to its tense.
The first meaning dates from around 1930. The second one dates from the 1920s.
This phrase is used to describe something very modern or updated or something that no longer looks like what it's used to.
It has been a long time since I left my high school, and now I have to admit that it's certainly not your father's high school anymore.